Primary mixing chamber in oil-burning mechanisms



June 17, 1930. o. A.- FOGARTY PRIMARY MIXING CHAMBER IN OIL BURNING MECHANISMS Filed July z, 192a FIG-4 I NVENTOR Patented June 17, 1930 UNITED STATE ORVILLE ALDEN FOGARTY, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR TO VILAS OIL BURNERS LIMITED, F CQWANSVILLE, CANADA PRIMARY MIXING- CI-IAMBER IN OIL-BURNING MECHANISMS Application filed July 22, 1926.

trated in the accompanying drawings that form part of the same.

The invention consists essentially of the novel features of construction pointed out broadly and specifically in the claims for novelty following a description containing in an explanation in detail of an acceptable form of the invention.

The objects of the invention are to insure a thorough mixture of the oil and air drawn from a supply vessel and the surrounding atmosphere; to deliver a mixture from the chamber that subsequent to the usual mixing at the coincident ingress of the oil and air is ironed out or compressed by passing it in a very fine film of comparatively wide and deep metal surfaces, thereby more thoroughly intermingling the air and the oil particles and forming a rich mixture to pass into the oil feed pipe and the nozzle; to facilitate the ignition by the careful preparation of the mixture as to quantities and pressure; and generally to provide an eflicient, durable and serviceable means of making the primary gas.

In the drawings, Figure 1 is a vertical sectional view of the mixing chamber showing the air and oil inlets and the gas outlet. Figure 2 is a cross sectional view on the line 2-2 in Figure 1.

Figure 3 is across sectional view on the line 33 in Figure 1.

Figure 4 is a longitudinal sectional view of the air ingress pipe.

Like numerals of reference indicate corresponding parts in the various figures.

Referring to the drawings, the casing 10 is preferably cylindrical and closed at the bottom 11 permanently, except for the threaded inlet 12.

The casing 10 is divided into upper and lower chambers 13 and 14 by the annular partition 15 from the inside wall, said partition having a large central opening 16 to be filled in as hereinafter explained.

The oil inlet of the casin is through the 59 side wall at 17 and this leads into and com- Serial No. 124,284.

municates with the corded passage 18 in the bridge 19. The passage 18 leads to the pierced boss20 centrally arranged in the chamber 14 and projecting upwardly from the bridge 19. The port 21 in the boss '20 is encircled by the seat 22 for the needle valve 23, which is returned to its seat after each operation by the weighted cylindrical shaped body 24 rigid with the valve stem 25 above the tapered'lower end 26 and having a reduced upper end 27.

The body 24 fits snugly in the opening 16 so closely as to form an annular port 28 of such fineness as to iron out or compress the mixture passing through to the chamber 13,

which it reaches in a perfect vaporous condition throughly mixed and comparatively light for a rich mixture.

The cover 29 is screwed into the casing 10 and is formed with a central inner lug 3O having a central guiding orifice 31 for the upper end portion 32 of the stem 25, this upper stem portion 32 projects through into the central threaded orifice 33 in the cover 29 and the adjusting screw 34 having the knurled head 35 is brought into the desired distance from the stem end to limit the travel of the valve 23 from its seat 22 according to the quantity of oil required for the furnace at each suction stroke.

The primary air pipe 36 is suitably fastened in the threaded inlet 12 and intermediate of its length the butterfly valve 37 is introduced having the operating stem 38 and lock nut 39, so that it may be set permanently on the finish of testing for the particular installation. The outer end of the primary air pipe 36 is formed with spiral baffles 40 to delay the rush of the air and form a muffler and a screen 41 covers the outer end. The noise is thus largely eliminated and the composition of the mixture much improved owing to the slight delay which provides a better chance for the air to take up the particles of oil.

In the operation of this machine, the oil is drawn by any suction means in the lower chamber through the needle valve port, where it is broken up into particles and takes the form of a spray. The air, which is coincidently drawn in, meets this spray and the oil particles join the air and the latter is comparatively heavy laden. The mixing so far accomplished is rough and loose and to a large extent a heterogeneous mixture though customarily used in that condition,

' but in this invention the loose ingredients are drawn between the metal surfaces of the cylindrical valve body and annular partition and thereby ironed out or compressed into a homogeneous body that takes the appearance of a fine fog, or light vapor, so Well are the ingredients brought together.

The oil is fed in by suction from any oil supply, here shown as from a vacuum tank 42 through the pipe 43 attached to the inlet 17 The gas reaching the chamber 13, through the annular port is drawn out through the outlet port 44 to a pump 45 or other suction member.

It Will be noticed that the oil has been clescribed as leavingthe' port 21, in the form of a spray, therefore the boss 20 is really a nozzle having the, port 21 as its jet orifice and it will be mentioned more frequently as a nozzle. 7

What I claim is A'primary mixing chamber in oil burning mechanisms, a cylinder having an inwardly extending circular flange in the interior in termediate of its height forming a central cylindrical hole and a circular block of cylindrical shape sliding freely in said hole and mounted on the needle valve and forming a filming passage for the mixture from a mixing chamber toean outlet chamber.

Signed at Montreal, Canada, this 14th day of June 1926. V

' ORVILLE ALDEN FOGARTY. 

